XML 144 R120.htm IDEA: XBRL DOCUMENT
v3.19.1

Operating Segment Information - Additional Information (Detail) - Segment | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Operating Segments [Abstract] |  |
Number of operating segments | 1 | 2

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- Definition Number of operating segments. + References No definition available. + Details
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Namespace Prefix: | cron_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration